I was trying to think of a movie that i might have seen.
All i can remember is a man pressing a button, and when he presses it his glass window (which was clear glass) appears to be frosted instantly.
Thats all i know, like i said, i might have dreamt this up but im not sure.
If it is any consolation, the technology for LCD screens and windows is available.
The switch sends a small current through the display to darken the glass, much like a digital watch display.
I’ve even seen it used for toilet cubicles, where closing the door makes the walls opaque.
(it is incredibly expensive at the scale of glazed screens and windows though)
Well, at least that part is not necessarily a fiction.
Have no idea about which movie it may have been in though. Sorry.
There was a scene in “Philidelphia” where Tom Hanks character get’s fired. The boss asks him to, “Get the windows please?”. He presses the wall switch and the windows change.